Emergency physicians are trained to recognize life-threatening conditions quickly. Heart attacks, strokes, and major trauma all have well-established protocols designed to help emergency departments identify them as quickly as possible. Rare drug reactions, however, can present a different kind of challenge.
Stevens-Johnson syndrome (SJS) and its more severe form, toxic epidermal necrolysis (TEN), are uncommon but potentially life-threatening conditions, most often triggered by medications. Because most treating physicians encounter relatively few cases during their careers, the disease can be difficult to recognize, particularly during its earliest stages.
Medical literature has consistently shown that diagnosing SJS requires more than identifying a rash. Instead, healthcare providers must piece together a combination of findings, including recent medication exposure, flu-like symptoms, evolving skin changes, and mucosal involvement, to determine whether a patient may be experiencing a rare but rapidly progressing medical emergency. Early recognition gives physicians the best opportunity to discontinue the suspected medication before the disease progresses.
Why Emergency Departments Can Miss Stevens-Johnson Syndrome
One of the biggest obstacles is timing. Patients rarely arrive at the emergency department with the dramatic skin loss most people associate with Stevens-Johnson syndrome. Instead, many initially report symptoms such as fever, sore throat, fatigue, red eyes, or a mild rash—complaints that are far more commonly caused by influenza, upper respiratory infections, conjunctivitis, medication allergies, erythema multiforme, or other infectious and inflammatory conditions.
Because those illnesses are encountered far more frequently than SJS, they’re often considered first. The challenge for emergency physicians is recognizing when a patient's symptoms no longer follow the expected course and instead point toward a rare but potentially life-threatening drug reaction. That process often depends on identifying patterns rather than relying on a single symptom.
Published case reports illustrate how easily Stevens-Johnson syndrome can resemble more common illnesses. In one report published in the Journal of Emergency Medicine, a 70-year-old woman receiving ribociclib (Kisqali) for metastatic breast cancer developed a painful rash after approximately 10 weeks of treatment. She was initially evaluated by a dermatologist and treated with prednisone, but her symptoms worsened, prompting an emergency department visit two days later. She was transferred to a specialized burn center, where a skin biopsy confirmed Stevens-Johnson syndrome. The authors concluded that emergency physicians should maintain a high level of suspicion for SJS in patients receiving cancer therapies because prompt recognition and discontinuation of the offending medication are critical.
A second published case report demonstrates how the diagnosis can become clearer only as symptoms evolve. A 46-year-old woman visited the emergency department multiple times over several days with a sore throat, red eyes, pain in her hands and feet, and a developing rash. During separate visits, she was treated for an upper respiratory infection and later diagnosed with conjunctivitis. It wasn't until her third emergency department visit, after additional specialists became involved, that physicians recognized Stevens-Johnson syndrome. The authors said the case highlights the importance of considering SJS when symptoms continue to worsen or no longer fit a more common diagnosis.
How Emergency Physicians Diagnose Stevens-Johnson Syndrome
In many cases, a patient's medication history raises the first suspicion that Stevens-Johnson syndrome may be developing. Since there is no single test that immediately confirms SJS, emergency physicians rely on the patient's history, physical examination, and the progression of symptoms to determine whether a severe drug reaction should be considered. Knowing when symptoms began, what prescription or over-the-counter medications were started recently, and how the rash has changed over time can all provide important clues.
Medical literature consistently shows that SJS most often develops during the first one to eight weeks after starting a new medication. However, certain drugs and repeat exposures may trigger symptoms sooner. Because the disease can progress rapidly, physicians may discontinue the suspected medication and begin supportive treatment before the diagnosis is confirmed.
Although a skin biopsy can help distinguish SJS from other blistering skin disorders, treatment decisions often can’t wait for biopsy results. Patients frequently require evaluation by multiple specialists, including dermatologists and ophthalmologists, while those with extensive skin involvement may be transferred to a specialized burn center.
Treatment focuses on managing the complications of the disease, including wound care, fluid replacement, pain management, nutritional support, and preventing complications such as infection. The earlier Stevens-Johnson syndrome is recognized, the sooner these interventions can begin.
When an SJS Misdiagnosis May Raise Medical Malpractice Questions
Most patients diagnosed with Stevens-Johnson syndrome are initially evaluated for a much more common illness. That fact alone doesn’t mean an emergency department or healthcare provider acted negligently. Medicine often requires physicians to distinguish a rare condition from dozens of more likely possibilities.
SJS medical malpractice concerns generally arise when warning signs that should have prompted further evaluation are overlooked or when accepted standards of care may not have been followed. Because every case is different, determining whether an SJS misdiagnosis was unavoidable or preventable requires a careful review of the patient's medical records, the timing of symptoms, and the clinical decisions made during each stage of care.
For patients and families with questions about whether a delayed diagnosis contributed to more severe injuries, speaking with an attorney experienced in Stevens-Johnson syndrome and medical malpractice cases may help them better understand what occurred and whether further investigation is warranted.
The published case reports discussed above illustrate why diagnosing Stevens-Johnson syndrome in the emergency department is so difficult. Patients rarely arrive with the textbook symptoms physicians learn about in medical training. Instead, they often present with complaints that resemble illnesses they evaluate every day.
The challenge is recognizing when those seemingly routine symptoms point to something far more serious. As researchers continue studying ways to improve recognition of severe drug reactions, experts continue to emphasize the importance of careful medication histories, close attention to evolving symptoms, and maintaining a high index of suspicion when a patient's condition doesn't follow the expected course.
